CSI完备性对自适应MIMO-OFDM系统性能的影响分析  

Analysis of CSI Completeness Effect to MIMO-OFDM System Performance

作　　者：张皓[1] 张文强[1] 伍云 

机构地区：[1]解放军理工大学通信工程学院 [2]解放军第73681部队

出　　处：《系统仿真学报》2009年第18期5854-5857,共4页Journal of System Simulation

摘　　要：针对MIMO-OFDM系统的自适应算法建立了性能评估模型,推导了非自适应和自适应条件下系统的频谱效率,研究了信道状态信息(CSI)的完备性对2×2 MIMO-OFDM系统性能的影响。理论分析和仿真结果表明MIMO-OFDM系统对信道估计误差和时延有着一定的鲁棒性,但在条件较恶劣时频谱效率还是会受到较大影响,进而提出了不完备CSI情况下的应对策略。An evaluation model for the adaptive algorithm of MIMO-OFDM system was built.After formulating system efficiency under static and adaptive conditions,the effect of imperfect CSI to the 2×2 MIMO-OFDM system was analyzed.Analytical and numerical results show the effect to the frequency efficiency when the CSI is imperfect,and simulations show that MIMO-OFDM is robust to channel delay to a certain extent.At last,the compensatory policies under imperfect CSI conditions were proposed.

关 键 词：自适应 频谱效率 信道状态信息 多输入多输出正交频分复用 

分 类 号：TN92[电子电信—通信与信息系统]